<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        alert("美好的一天又开始了");
        prompt("输入你活了多少年");
        console.log(13);

    </script>

    <button onclick="alert('点我干嘛')">点我</button>
</body>
</html>